Thread-fastening machine



June 8 1926.

v 1 587 964 F. N. LA CHAPELLE THREAD FASTENING MACHINE Filed Dec. 20, 1919 2 Sheets-Sheet 1 a m ham? June 8 1926., F. N LA CHAPELLE 1,587,964

THREAD FASTENING MACHINE Filed Dec; 20, 2 Sheets-Sheet 2 Patented June 8, 1926.

(UNITED STATES 'rnnn n. LA GHAPELLE, or BEVERLY, mnssnerrusn rrs, nssrenon 'ro UNITED snon MACHINERY CORPORATION, or 'P-ATERSQN, new JERSEY, A conronnzrron on NEW JERSEY.

THREAD-FASTENING MACHINE;

' Application meane em e rzo, 1919, Serial No, 346,490.

The present invention relates to certain improvements in thread handling machines and more particularly to machines of the 'general type shown and described inthe patent to La Chapelle, No, 1,185,108, dated day so, 1916. i

These machines are designed for temporarily securing together the insole and upper of a lasted shoe by the insertion of separate,- thread fasteners therethrough. Each fastening consists of two loops of thread passed through the work fromthe same side and with the first loop of thread interlocked with the second loop upon the opposite, side. The stitch-forming instrumentalities em.- ployed for this purpose comprise generally a curved eye-pointed needle for forming. the two loops of thread and a cooperating thread finger which serves to pass the first loop of thread through the. second.

, It sometimes" happens with these machines, especially where a'waxed thread is used, that the first, loop of thread does not become disengaged from the thread finger whenthe latter is withdrawn, and, in con.-

sequence, fails to-in'terlock'with the second loop-in the desired manner. It is, therefore, one object of the present invention to provide certain improvements in. a machine of this character for insuring the formation of a perfect stitchin. every instance."- i I lVith this object in View, one feature of "the invention, then, contemplates the proviv sion in aithread' handling machine, comprisinga needle actuated to pass two loops "of thread through the work from thesame side and a reciprocating loop. carrier for engaging the first loopof thread and passing it through the second: upon the opposite side of the work, of a loopnretaining memher for engaging behind the firstloop of thread when the thread finger has advanced to prevent withdrawal of the loop with the A further feature of the invention con sists in the combination with a reciprocatthread finger of" a normallyistationary lo p 'i-fialll'il ng member extending across theq ath of thread'fin'ger and adapted to engage behind a loop of threadcarried thereby. I

A still further feature olj the invention assists mare-evens i h a e ip eating thread finger adapted to carry a loop of thread, of a loop retaining member yiel i gly Su p rt d adjac n h r thof movement of the thread finger in such a manner ,that it willengage behind a p.

of thread carried thereby without bearing upon the thread finger with any substantial.

pressure. With thisteature, the loop r6 ta nmg, member rides lightly over. the loop of thread thefthread' linger is advanced and her f er drops W i h nd th hr l op o i s re that it .ha 1 b nefi fifrom'the thread finger when the',lat.tei' retracted. V

In the accompanying drawings illustratg s the Pr e red f r of he nt on Figl is a; ram e ation o a ma hin e b dying th impre 'feat re f t e ven'tion; Fig.- 2Qisa detail illustratingf on 618mm f, he. imp-raved op mi ing dev e and cooper ing t c iq mng ins rum n l ee; l l es a sideelev ition of the mechanisrn shown Fig. ,1; and Figs. 4;; to 8 inclusive are diagrammatic representationsogt that portiongof the formation of a-stitch vin the loop, retaining device cooperates with .thepthread-torming instrnmentalities. i 7

The mach n show i the illustrated, em-

loodin entof theinventiongis provided; with a curved eye-pointedneed-le -10 actuated to pass two, separate loopsof; thread through t e W k om the same i e', and e eipr ea ng th e 1 finger lls gned-t enga ith he first' qor o th eaduandpassit r ugh the -S 60nd pon he opp site side or the work. The thread finger ,l1,,as illustra ed in Fig.- 1 of; th e-Wi g i i stebly m unte in enre iproca i g sl de 12,: actuated fromfthe' usual rotary cam to advance and retract the-thread fi ger-in a straight linepath as fully. disclose'dih the patent toLa Ghapielle relic-reed. to. During the formation. of the stitch, the work". is-

held in position by'the usual back gage l3 andiehani ieltguide As will. lloe'f -cbse rved upon an inspection? .oflEigs; "-tOFZiQwiHQLE- sive, the needle 101' actnatedwto pass a loop }of thread termed upon the ned- Th r after theigneedle i tuatedf to pass a ndjl, 01p. of thread 6) bet ii. t

an inspection of Fig. 4 that the second ed vancing movement of the needle is greater than'the first s that a straight line movement of the thread finger, when advanced, will cause the end to pass between one side of the loop (6) and the shank of the needle as shown in Fig. 5, carrying the first loop of thread through the second. Thereafter the thread finger is withdrawn simultaneously with the rearward movement of the needle to set the stitch, leaving the loop of thread (a?) interlocked with the loop of thread (1)).

The present invention aims to insure the retention of the first loop of thread within the second, and to this end, a loop retaining member or cast-oil 20 is designed to engage behind the loop (a) of thread after it, has been passed through the loop (6) by the thread finger 11. In the illustrated embodiment of the invention, the cast-oft is in the form of a pointed arm extending across the path of movement of the thread finger and is supported in such a manner with respect to the second advancing movement of the needle that the thread finger passes first through the second loop of thread and then beneath the arm which rides lightly over the first loop of thread on the thread finger. Then the thread finger is completely advanced, the operative end of the arm is positioned behind the loop of thread on the finger in a manner to prevent withdrawal of the loop with the finger. I

As shown in the drawings, the member 20 extending across the path of movement of the thread finger is pivotally supported to rock toward and away from the thread fin.- ger. This pivotal connection is formed by an integral stud 22 which is received within a bearing sleeve 23 adjustably connected to a bracket 24 through a tongue 31 and dove- .asthe latter moves thereunder.

tailed groove 30 formed respectively upon the sleeve and bracket as indicated in Fig. 3.

ment with respect to the machine frame through bolt and slot connections indicated at 25, and in addition, the bracket is provided with an elongated slot 21 which causes the tongue 31 to be gripped positively upon tightening the bolt 25. Thus it will be seen that the loop retaining member has a capacity for both vertical and lateral adjustments to locate it properly with respect to the path of movement of the thread finger.

According to the present construction, the loop retaining member is designed to be normally supported with its operative end in a position to just clear the thread finger This position of the loop retaining member is maintained yieldingly in order that it may ride over the thread carried by the finger 11. In

order to yieldingly support the arm 20 in thisposition, a tension spring 26 is connect r ed between a collar 28 clamped upon the end of the stud shaft 22 and a pin 27 mounted on the machine frame. The collar 28 is clamped to the stud shaft 22 by a set screw 33 and is provided. with a tail 34L adapted to engage with the front face of the bracket 24 to determine the normal position of the arm 20. It will be evident that by loosening the collar 28 on the stud shaft 22, the

vertical position of the arm 20 may be varied as desired to locate the pointed end of the arm accurately with relation to the path of n'iovement of the thread finger.

The operation of the loop retaining mem-. her in conjunction with the thread finger is shown clearly in Figs. l to 8 inclusive of the drawings. As the thread finger advances, in Fig. 5, the loop retaining member first engages lightly and rides over the loop (a) of thread held thereby. When the thread finger is completely advanced, as shown in Fig. 6, the end of the loop retaining inemberhas dropped down behind the loop or thread in such a position that upon the withdrawal of the thread fingerQin'Fig. 7, the loop of thread is engaged and held by the pointed end of the arm v20. When the take-up acts to draw the second loop of thread into the work, as shown in Fig. 8, the first loop is drawn ofi' of the pointed end of the member 20. This construction is claimed is The bracket 24 is capable of vertical adjustl. A thread handling 'machine comprising a needle, means for actuating the needle to pass two loops of thread through the work from the same side, a thread finger for engaging the first loop of thread and passing it through the second upon the opposite side of the work, and a member for engaging behind the first loop of thread when the finger is in an advanced position to prevent withdrawal of the loop with the thread. finger.

2. A thread handling machine comprising a thread finger, means for reciprocating the thread finger, a loop retaining member extending across the path of movement of the thread finger, and means for yieldingly supporting the member in position to-ena gage behind a loop of thread carried by the finger when the latter is in an advanced position.

3. A thr ad handling machine comprising a thread finger, means for reciprocating the thread finger, a loop retaining member pivotally supported above the thread finger in position to engage behind a loop of thread on the carrier when the latter has reached an advanced position.

5. A thread handling machine comprismg a loop carrier, means for advancing and retracting the loop carrier a normally sta-' tionary loop retaining arm for casting ofi a loop of thread from the carrler when the latter is retracted, and means independent of the carrier for determining the operative positionof the arm. I

6. A thread handling machine comprising a loop carrier means for advancing and retracting the loop carrier, a normally stationary loop retaining member supported in pronimity to the path of movement of the carrler and adapted to cast a loop of thread off the carrier when the latter is retracted, and means for supporting the loop retammg member having provision for vertical and transverse adjustment With respect to the path of movement of the carrier.

7. A thread handling machine comprlsing a loop carrier, means foradvancing and retracting thelo op carrier, a pivoted arm extending across the path of the loop carrier, and a tail adjustably connected With the arm and adapted to contact With a fixed portion of the machine-frame to determine the operative position of the arm With respect to the path of movement of the carrier. 8. A thread handling machine comprise ing a loop carrier, means for advancing and retracting the loop carrier, an arm extending across the path ofmovement of the carrier, an adjustable bracket a shaft projecting from the arm and journaled Within the bracket, a collar clamped to the shaft, and a spring connected with; the collar and adapted to yieldingly retain the arm in an operative position.

, FRED N. LA CHAPELLE. 

